有一游标卡尺,主尺的最小分度是1mm,游标卡尺上有20个小的等分刻度

有一游标卡尺,主尺的最小分度是1mm,游标卡尺上有20个小的等分刻度。用它测量一小球的直径,如图1所示的读数是________mm。

用螺旋测微器测量一根金属丝的直径,如图2所示的读数是________mm。

 

答案

13.55mm        0.680~0.682mm

解析:略

 

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